多元醇液化麻竹－環氧樹脂製備聚摻合樹脂之膠合性能

Gluability of Polyblend Resins Prepared from Polyhydric Alcohol Liquefied Ma Bamboo with Epoxy Resin

吳秋昌(Chiou-Chang Wu) ； 李文昭(Wen-Jau Lee)

《林產工業》 27卷1期 (2008/03) Pp. 31-40

https://doi.org/10.6561/FPI.2008.27(1).4

摘要

本研究將麻竹（Dendrocalamus latiflorus Munro; ma bamboo）以聚乙二醇（Polyethylene glycol; PEG）與丙三醇（Glycerol）之混合液為溶劑，H_2SO_4為催化劑進行液化處理，將所得液化麻竹與與雙酚A型環氧樹脂混合調配聚摻合樹脂（Polyblend resins），並以三乙基四胺（Triethylene tetramine; TETA）為架橋硬化劑，探討聚摻合樹脂之硬化性及膠合性。由試驗結果顯示，液化麻竹與環氧樹脂之聚摻合樹脂添加TETA為架橋硬化劑時具備常溫硬化性，其膠化過程為一放熱現象，然隨液化麻竹添加量增加，其硬化反應活性減緩，膠化時間增長。將聚摻合樹脂應用木材膠合劑時，液化麻竹添加量20 phr之摻合樹脂之膠合強度與對照組環氧脂相近，而液化麻竹添加量提高至60 phr者，膠合時採用90℃加熱3 h可改善其硬化後膠合材之耐水膠合強度。

關鍵字

環氧樹脂 ； 液化麻竹 ； 聚摻合樹脂 ； 多元醇

並列摘要

＂Dendrocalamus latiflorus＂ Munro (ma bamboo) was liquefied in polyethylene glycol (PEG)-glycerol co-solvent with H_2SO_4 as a catalyst. The liquefied ma bamboo was blended with diglycidyl ether of bisphenol A type epoxy resin to prepare the polyblend resins, and the triethylene tetramine (TETA) was used as a cross-linking hardener. The curing reactivity and gluability of various polyblend resins were investigated. The results showed that liquefied ma bamboo-epoxy resin polyblend resins could cure at room temperature as the hardener of TETA was added. The curing reaction of the polyblend resins was an exothermic reaction. But the curing reactivity would be slowed down and the gel time prolonged as the rate of liquefied ma bamboo in the polyblend resins increased. When the polyblend resins were applied in the wood gluing, the polyblend resin with 20 phr of liquefied ma bamboo had the bonding strength similar to that of the blank pure epoxy resins. In addition, the wet bonding strength of the polyblend resin with 60 phr of liquefied ma bamboo could be improved by curing at 90℃ for 3h.

並列關鍵字

Epoxy resin ； Liquefied ma bamboo ； Polyblend resin ； Polyol